Windows 10 Insider Preview Build 21390 X86 X64 Iso Incl !!link!! -

Windows 10 Insider Preview Build 21390, released on May 26, 2021, stands as a pivotal "bridge" build in Microsoft's development history. While officially labeled as a Windows 10 Dev Channel release from the "Cobalt" (CO) branch, it was effectively the final build before the public unveiling of Windows 11. Core Features and Improvements

6. Comparison with Other Insider Builds

| Build | Release date | Branding | Significance | |-------|--------------|----------|--------------| | 21390 | May 2021 | Windows 10 | Last Win10-branded Dev build | | 22000.51 | June 2021 | Windows 11 | First Win11 Dev build | | 19044 (21H2) | Nov 2021 | Windows 10 | Final stable Win10 release | windows 10 insider preview build 21390 x86 x64 iso incl

Final Appearance of Live Tiles: According to community observations, this build was one of the last to feature the Live Tiles introduced in Windows 8 before they were phased out in favor of the Windows 11-style Start menu. Windows 10 Insider Preview Build 21390, released on

KB5004123 (Build 21390.2025): Released June 14, 2021, the final iteration. Availability: x86, x64, and ISO Details Announcing Windows 10 Insider Preview Build 21390 Press Shift+F10 at the "Region" screen

  • Press Shift+F10 at the "Region" screen.
  • Type regedit and navigate to HKEY_LOCAL_MACHINE\SYSTEM\Setup
  • Create a new DWORD (32-bit): AllowExpiredSetup with value 1
  • Create new DWORD: IgnoreRebootOnSetup with value 1
  • Close regedit, continue installation. The OS will run with a watermark.

Microsoft Releases Windows 10 Insider Preview Build 21390 for Insiders

Method 1: UUP Dump (Recommended for enthusiasts)

Microsoft publishes Insider builds as encrypted UUP (Unified Update Platform) files. The open-source tool UUP Dump converts these to a clean ISO.

Windows 10 Insider Preview Build 21390 was a notable release in the Dev Channel during the mid-2021 period, serving as one of the final builds in the "Cobalt" semester before the transition to Windows 11. It was primarily focused on visual refinements and testing the servicing pipeline rather than major new functional features. Key Features and Visual Changes